Upvote:0
Another poster here introduced me to Simporium, which offers information about and purchase of prepaid SIM cards for many countries, including the USA. They have two USA prepaid SIMs available, one on AT&T for $50-$60, one on UltraMobile (with worse coverage) from just $19. They will ship to Germany for $7, but it takes two weeks:
Upvote:2
If you have a friend in the US, you can order a SIM card on the internet and have it shipped to their house.
Alternatively, you could try ordering one from Amazon, such as this one, and see if they'll ship internationally. I recommend using Ptel (Platinum Telecom), which runs on the T-Mobile network and has the cheapest rates for internet data that I've found.
Upvote:5
Your best bet is to visit an AT&T Shop or a T-Mobile Shop upon arrival. These are the two providers that actually sell SIM cards, as far as I know. The US cell phone providers focus on selling cell phones with a SIM-card-in-software that they tie to the phone. It is less common for AT&T to sell a SIM card, but you might have luck there. T-Mobile shops sell SIM cards regularly.
Note that getting a SIM card is a bit easier than in Germany, as you don't actually need ID when buying a pre-paid SIM card - just bring some cash to the shop, tell them what pay-as-you-go plan you want, and 10 minutes later things work. I only tried T-Mobile for that in the past. Available plans are hidden somewhat on the web page: http://prepaid-phones.t-mobile.com/prepaid-plans
Having some experience with both the US Cell Phone "system" and the German one, please be prepared to pay more for Internet on the cell phone than you would in Germany.
Note that some airports have "tech gadget" vending machines. If you tranfer in Philadelphia or Newark, you should find one. As it is not legally required to provide your ID for registering a phone/SIM card, you might have luck finding a SIM card (or a cheap phone with internet) there.